package com.xiguthings.xiniu.iot.device.state.common;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;

@Component
public class SpringUtils implements ApplicationContextAware {

	private static Logger LOGGER = LoggerFactory.getLogger(SpringUtils.class);

	private static ApplicationContext applicationContext;

	@Override
	public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
		if (SpringUtils.applicationContext == null) {
			SpringUtils.applicationContext = applicationContext;
		}
		LOGGER.info("---------------------------------------------------------------------");

		LOGGER.info("---------------------------------------------------------------------");

		LOGGER.info(
				"---------------com.xiguthings.xiniu.iot.elt.common.SpringUtils------------------------------------------------------");

		LOGGER.info(
				"======== ApplicationContext配置成功,在普通类可以通过调用SpringUtils.getAppContext()获取applicationContext对象,applicationContext={} ========",
				SpringUtils.applicationContext);

		LOGGER.info("---------------------------------------------------------------------");
	}

	// 获取applicationContext
	public static ApplicationContext getApplicationContext() {
		return applicationContext;
	}

	// 通过name获取 Bean.
	public static Object getBean(String name) {
		return getApplicationContext().getBean(name);
	}

	// 通过class获取Bean.
	public static <T> T getBean(Class<T> clazz) {
		LOGGER.info("---------------------------- applicationContext = {} -----------------------------------------",
				getApplicationContext());
		return getApplicationContext().getBean(clazz);
	}

	// 通过name,以及Clazz返回指定的Bean
	public static <T> T getBean(String name, Class<T> clazz) {
		return getApplicationContext().getBean(name, clazz);
	}

}
